International Olympic Committee President Thomas Bach reiterated Friday that vaccination for the coronavirus will not be a requirement for athletes competing at the Tokyo Games following concerns about the slow pace of the vaccine rollout in Japan.

With the Olympic host nation having faced delays securing vaccine doses, there is a possibility some Japanese athletes may not be vaccinated in time for the start of the games on July 23.

But Bach, speaking at a press conference following an IOC session, said the body had "made it clear from the very beginning" that it would not impose an obligation for vaccination, and would follow government guidelines on the matter.